The nintendo DS has just undergone an overhaul. Now we have the DS lite, which is lighter weight, and brigheter than the previous model. It is a comfortable fit in your hands, closes to protect the screen, has decent sound which can be connected to headphones or speakers. It plays the two most recent formats of nintendo games, and boasts built in wireless capability so that you can play with your friends, or you can set it up to work over a wireless network and play over the Internet.
From the current games, I have nintendogs (lab and friends) and brain age, both of which I really like. This is a great hand held system, very affordable compared to the psp. I love the touch screen, and the microphone voice recognition.